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Letters .Patent No. "106, 7 67, dated August 30, 1870.

IMPROVEMENT IN WOD-TURNIN'G- LATHESv The Schedule referred to in these Letters Patent and making' part of the same To all whom 'it may concern:

Be itknown that I, FREDERICK BALDWIN, of J anes.- ville, in thecountyot' Rock and State of Wisconsin, have invented new andI useful Improvements in Woodtnrning Lathes; and I dohereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accon'ipanying drawing forming part ot' this specification.

This -invention relates to improvements iny automatic lathes for turning spirallybeaded work, and consists inthe attachment to the improved lathe on which .patents were `granted to me the 24th day of August, 1858, No. 21,240, and the 18th day of June, 1867, No. 65,864, for increasing or diminishing the feed when cutting spirals on tapered sticks, and to vary the pitch ofthe spirals Vaccording to the size, the same being so arranged that the machine may be Vreadily shifted to turn tapered sticks or sticks with uniform diameter throughout, and, when tapered work is produced, the alternate sticks following each 'other through the mandrel in succession will be workedA from the large to the small end, and vice versa. 4

, Figure 1 isa side elevation of a part of a lathe of with my improved attachment applied;

Figure 2 is a sectional elevation of the same; and

Figure 3 is a plan view.

i l 'Ihe frame is the same-as represented in Patent No. 65,864.

Un the top of Athe frame are the cross-bar A and stationary hollow mandrel B.

Around the periphery of the cutter disk C, which runs loosely on this mandrel, is `a gear, which gears into a pinion, D, and is driven bya belt passing round a'band-wheel on the driving-shaft F, near the bottom of the frame and over a pulley, e, on the same shaft.

On'one side of the` frame and on the lower part is la shaft, which has a cone of pulleys, G, on one end, which corresponds with another cone, H, on the end ot' driving-shaft E, and receives its mot-ion from it by means of a belt.

0n another portion of this shaft is a long tapering cone or pulley, I.

Directly over this, and near the top ofthe frame, is

another shaft, K, carrying a cone, L, corresponding with this','and on the endof this shaft is a cone of pulleys, P, which correspond with the 'cone of pulleys H on the driving-shalt E, and receives its motion from it as occasion requires, and which will be hereinafter described.

A Between these two shafts, and about equal distance 4from each, is a screw-shait, M, carrying a cross-piece, N, which slides on a. rod, m, that is iastened to the' journal-boxes of this shaft, and running parallel with NFit; the ends of this cross-pieceheing forked. to admit Qt' a belt passing through them." l

On one end of this screw-shaft'is apinion, 0,*which gears into the pattern-wheehof the patents 21,240 and 65,864, and represented-here by dotted lines at 0. The size of this pinion and pitchmof the screw is such that one revolution of the lpattern-wheel carries and through the forked ends of this cross-piece, on motion being given to the lower cone by a' belt from pattern-wheel turns the screw-shaft by means of' the pinion O, the motion of the upper cone-shaft will be gradually diminished or' increased, according as the pattern-wheel turns one way o1' the other, and it will be further seen that when this upper cone-shaft is connected with the feed-wheel and 'pattern-wheelby means of bevel-gears, and worms, and worm-wheels, shown dotted at o2, o, and o4, as represented in patent No. 65,864, that their motion will be also diminished or increased. vThe object-of this willpresently be more clearly seen. i I

l/he inishing'cntter-disk, represented on the drawing at O, carries three, more or less numbers of, cut ters b, which are held on dogs or 'knife-holders, and operated by the pattern-.wheel O, the same as described in Batent No.- 65,864.

another cutter-disk, carrying gouge-knives, the same Yas represented-,in Patent No. 21,240, for the purpose of rounding the sticks to be turned and fitting them to the die in the mandrel.

This cutter-disk receives its motion from the pulley S on the driving shaft underneath.

The feed-wheel O4 is operated by the worm-wheel O, turned constantly in onedirection by the wheel O gearing with the wheel on the eone-shaft K, having the upper cone L.

The pattern-Wheel is turned by the worm ll on thc shaft P" working inthe sleeve 05, and turned either way, asit is requiredeto have the pattern turn, the shaft P3 being turned either by the wheel O2, independently of the wheelOi, or by the latter when the wheel O2 is unc-hitched and allowed'to run loose.

The shifting ofthe wheel O2, and the connection or disconnection of the shaft I with the sleeve O? or the wheel 0i to change the/motion of' the patternlwheel, are effected by the sliding-bar and lever, shown atl.

These feed and pattern-wheel devices are the saine as represented in the patents aforementioned, and, not being a new claim, are shown in dotted lines.

The operation for turning a spiral-tapering moulding is as follows:

A pattern being placed on the pattern-wheel, one

the cross-piece from one end of the cones to the other.I

It will be seen, by passing a belt around these cones l the cone of pulleys on the driving-shaft, that, as` theA On the opposite endofthe mandrelis-to run loosely end being wider than the other, according to the desired taper, the screw-shaft is turned till the belt, passing around the cones, is brought tothe small end of the upper cone L. The pattern-wheel is then put in position, so that the rod m, restingr on the pattern, and which operates the knife-holders to work them in and out on .the disk, as in the patent 65,864, rests ou the wide end of vthe pattern, a belt being placed on the cone of pulleys H on the driving-'shaft E, and round the cone of pulleys G on the lower cone-shaft I, and a belt is also placedraronnd the band-wheel, at the large end of cone of pulleys on driving-shaft E, and around pulley c' on pinion-shaft, which gives motion to finishing cutter-disk C, and also a belt is placed around the cutter-disk on the other end of stationary mandrel.

'lhe machine is set in motion. A stick to be turned is placed between the feed-wheels, and is carried to the gouge-knives, and is rounded smoothly to a size that lits the diel in the stationary hollow mandrel. As it reaches the nishin'g-knives, or finishingT cutter-disk, the patterl'i-wheel is set in motion, carrying the pattern toward its narrow end, the screw-shaft being also lin motion as its pinion' gears into the pattern-wheel.

'lhe belt passing round the cones is gradually carried toward the large end of upper cone L, and thus the feed is gradually diminished in size by the pattern.

It will be seen that, by making the finishing-knives the proper shape, any desired form of bead, hollow,

round, or molding, can be cnt spirally around the stick by placing them in the knife-holders on iinishing cut ter-disk, and by giving the cutter-disk the proper mo.- tion compared with the feed any desired pitch of' spiral can be cnt.

It will also beseen byvthis operation that, as the stick is tapered to a smaller diameter, and the feed is diminished, the pitch of the. spiral will also be diminlters, the motion of the pattern-wheel is reversed, and

also the screw-shaft, and the operation is the same as on the-first stick, except that itl is turned the other end first.

To turn sticks ofthe same diameter their whole length, the patternwheel stands still, and the belt passing round the long cones is taken o and one placed on the cone of pulleys at the end of drivingshaft and around the cone of pulleys on the upper cone-shaft, and the pinion of the screw-shaft is taken oif; and to leave the stick plain at any desired point there is a projection made on the pattern suicient to throw the finishing-cutters out of the stick; and when it is desired to leave a plain section the pattern is started, and the projection passing the rod marked m, which operates the cutters l,thro\vs the finishing-cutter out oi' the stick, and it passes plain the length of the projection on the pattern.

Having thus described my invention,

I claim as new and desire to secure by Letters Patent- The conibination, with the shaft K, pinion O, wheel O, worm-wheels O3 and Pl, shaft l, and feed-wheel 0*, of the cone-pulleys IL, the beltshifter N, and the screw-shaft M. the latter being arranged to gear with the pattern-wheel` all substantially as specified.

The above specification of myinvention signed by me this 21st day of February, 1870. v

Witnesses: FREDERICK BALDWIN.

CHARLES PENNIMAN, ALEX. G. DONNELLY. 

